아래 예제 및 결과를 참고 하세요...
package onj;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class ForTest {
static int[]
squares = { 0, 1, 4, 9, 16, 25 };
private static
List arrayList = new ArrayList();
private static
void fill() {
for (int i = 0;
i < 5; i++) {
arrayList.add(i);
}
}
static void
forDisplay1() {
for (int i = 0;
i < squares.length; i++) {
System.out.printf("%d
squared is %d.\n", i, squares[i]);
}
}
static void
forDisplay2() {
int j = 0;
for (int i :
squares) {
System.out.printf("%d
squared is %d.\n", j++, i);
}
}
static void
arrayListDisplay1() {
for (int i = 0;
i < arrayList.size(); i++) {
System.out.printf("%d
arrayList is %d.\n", i, arrayList.get(i));
}
}
static void
arrayListDisplay2() {
Iterator
iterator = arrayList.iterator();
int j = 0;
for (;
iterator.hasNext();) {
System.out.printf("%d
arrayList is %d.\n", j++, iterator.next());
}
}
static void
arrayListDisplay3() {
int j = 0;
for (Object i :
arrayList) {
System.out.printf("%d
arrayList is %d.\n", j++, i);
}
}
public static
void main(String[] args) {
forDisplay1();
System.out.println("---------------------");
forDisplay2();
System.out.println("---------------------");
fill();
arrayListDisplay1();
System.out.println("---------------------");
arrayListDisplay2();
System.out.println("---------------------");
arrayListDisplay3();
}
}
[결과]
0 squared is 0.
1 squared is 1.
2 squared is 4.
3 squared is 9.
4 squared is 16.
5 squared is 25.
---------------------
0 squared is 0.
1 squared is 1.
2 squared is 4.
3 squared is 9.
4 squared is 16.
5 squared is 25.
---------------------
0 arrayList is 0.
1 arrayList is 1.
2 arrayList is 2.
3 arrayList is 3.
4 arrayList is 4.
---------------------
0 arrayList is 0.
1 arrayList is 1.
2 arrayList is 2.
3 arrayList is 3.
4 arrayList is 4.
---------------------
0 arrayList is 0.
1 arrayList is 1.
2 arrayList is 2.
3 arrayList is 3.
4 arrayList is 4.
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